Newly created C2 Operating System

Introduction

The C2OS kernel is written in 16-bit x86 real mode assembly language. This gives the information of the hardware.

This OS can be bootable through floppy disk, CD Rom & USB.

Pre-requisites for this task

Basic knowledge of assembly language is needed for this.

mkisofs — This is to generate a CD-ROM ISO image of C2OS

sudo apt-get install cdda2wav cdrecord mkisofs

NASM — This tool can be installed using terminal in Ubuntu following code.

sudo bash apt-get install nasm

QEMU — This is an emulator and this is to run .flp/.iso file that we needed. Code to install this tool is,

sudo bash apt-get install qemu-system-x86

Above mentioned tools should be installed prior to coding of OS.

You can find the source code by the following link.

Go to source/kernel.asm

In C2OS operating system, the source code for displaying hardware information is also included in kernel.asm

And the features of the operating system is included in souce/features/..

In kernel.asm each source code is explained using comments.And programs/c2dev.inc is described the system call vectors.

Structure

source/.. contains the entire OS source code

source/bootload/.. — source to generate bootload.bin, which is added to the disk image when building

source/kernel.asm — The core kernel source file, which pulls in other source files and it includes source code which needs to display the hardware information.

programs/.. — Source code for programs added to the disk image

Booting

Disk images

After you have extracted the C2Os.zip file, switch into the disk_images/ directory and you’ll see three files:

C2os.flp — Floppy disk image containing C2OS and programs

C2os.iso — CD ISO image built using the floppy disk image

So, these files are virtual disk images that you can write to real floppy disks or CD-Rs, or run in a PC emulator as described in a moment.In Linux, you can run build-linux.sh to make cd iso image.

Build-linux.sh

This script assembles the C2OS bootloader, kernel and programs
with NASM, and then creates floppy and CD images (on Linux).Only the root user can mount the floppy disk image as a virtual drive (loopback mounting), in order to copy across the files.

Now you can run the iso image using virtualbox.

Screen shots

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For downloads

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